JSON Validator
Validate JSON and locate parse errors without uploading your data.
Free. No signup required.
What this tool does
Check JSON syntax and inspect parse errors locally. Find problems with commas, quotes and brackets before formatting or converting your data.
How to use
Paste JSON to check its syntax. Valid JSON can be sent directly to the formatter.
Features
See whether JSON parses and locate an error before formatting or conversion.
When to use it
Check a configuration snippet after editing commas, quotes or brackets.
Example and checks
The first object below has a trailing comma; the second is valid JSON. Keys and strings require double quotes. Check matching braces and brackets, including arrays inside objects. Error line or position information is shown when the browser parser supplies it; the cause can occur before that point. Validation checks syntax, not required fields or your application's schema.
{"name": "demo",}
{"name": "demo"}Common questions
Does validation check my application's schema?
Checks JSON syntax, not an application schema or the accuracy of values.
Data processing
This tool processes its input locally in your browser without sending it to a server for processing. Input and results are not included in share URLs.
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Related guides
How to Validate JSON and Fix Common Syntax Errors
Find common JSON syntax errors, repair quotes and trailing commas, then format nested data without changing its meaning.
How to Format JSON and Make It Readable
Make compact JSON readable with indentation, inspect nested objects and avoid changes to large identifiers or duplicate keys when formatting.